Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9568053 | Method and apparatus for limiting rotation of a drive shaft in a reverse direction | — | 2017-02-14 |
| 9366119 | Drive head for a wellhead | Craig Hall | 2016-06-14 |
| 8899314 | Stuffing box | — | 2014-12-02 |
| 7337851 | Rotating stuffing box with split standpipe | Craig Hall | 2008-03-04 |